imported>Hydrogen Sulfide2025年1月1日 (三) 04:43的版本 (创建页面,内容为“{{英文版本|镆}} '''Moscovium''' is a radioactive element in group 15, period 7, block p, with atomic number 115 and symbol Mc. In Antimonia, a relatively stable isotope Mc-301 has been found, while Mc-290 that prepared by Earthlings has the half-life of only 0.65 second. It is an yellowish-grey metal, has a certain degree of toxicity, and its melting point is rather low. Moscovium has some difference properties from other pnictogens. Due to the stability…”)